TJA1043T datasheet(5/27 Pages) PHILIPS

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TJA1043

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Product data sheet

Rev. 3 — 24 April 2013

5 of 27

NXP Semiconductors

TJA1043

High-speed CAN transceiver

TJA1041A with improved EMC and ESD capability and quiescent current performance.

Improved slope control and high DC handling capability on the bus pins provide additional

application flexibility.

7.1 Operating modes

The TJA1043 supports five operating modes. Control pins STB_N and EN are used to

select the operating mode. Switching between modes allows access to a number of

diagnostics flags via pin ERR_N. Table 4 describes how to switch between modes.

Figure 4 illustrates the mode transitions when VCC, VIO and VBAT are valid.

[1]

Setting the UVNOM flag will clear the WAKE flag.

[2]

Setting the Wake flag will clear the UVNOM flag.

[3]

A LOW-to-HIGH transition on pin STB_N will clear the UVNOM flag

[4]

After the minimum hold time, in Go-to-Sleep mode, th(min), the transceiver will enter Sleep mode and pin

INH will be set floating.

Table 4.

Operating mode selection

Internal flags

Control pins

Operating mode

Pin INH

UVNOM[1]

UVBAT

Wake[2]

STB_N[3]

From Normal, Listen-only, Standby and Go-to-Sleep modes

set

Sleep mode

floating

cleared

set

HIGH

Standby mode

HIGH

cleared

set

LOW

Standby mode

HIGH

cleared

LOW

Standby mode

HIGH

cleared

LOW

HIGH

Go-to-Sleep mode[4]

HIGH[4]

cleared

HIGH

LOW

Listen-only mode

HIGH

cleared

HIGH

Normal mode

HIGH

From Sleep mode

set

Sleep mode

floating

cleared

set

HIGH

Standby mode

HIGH

cleared

set

LOW

Standby mode

HIGH

cleared

LOW

Sleep mode

floating

cleared

HIGH

LOW

Listen-only mode

HIGH

cleared

HIGH

Normal mode

HIGH

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